using System;
using iTextSharp.text.pdf;
/*
 * This file is part of the iText project.
 * Copyright (c) 1998-2009 1T3XT BVBA
 * Authors: Bruno Lowagie, Paulo Soares, et al.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License version 3
 * as published by the Free Software Foundation with the addition of the
 * following permission added to Section 15 as permitted in Section 7(a):
 * FOR ANY PART OF THE COVERED WORK IN WHICH THE COPYRIGHT IS OWNED BY 1T3XT,
 * 1T3XT DISCLAIMS THE WARRANTY OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
 *
 * This program is distributed in the hope that it will be useful, but
 * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Affero General Public License for more details.
 * You should have received a copy of the GNU Affero General Public License
 * along with this program; if not, see http://www.gnu.org/licenses or write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA, 02110-1301 USA, or download the license from the following URL:
 * http://itextpdf.com/terms-of-use/
 *
 * The interactive user interfaces in modified source and object code versions
 * of this program must display Appropriate Legal Notices, as required under
 * Section 5 of the GNU Affero General Public License.
 *
 * In accordance with Section 7(b) of the GNU Affero General Public License,
 * you must retain the producer line in every PDF that is created or manipulated
 * using iText.
 *
 * You can be released from the requirements of the license by purchasing
 * a commercial license. Buying such a license is mandatory as soon as you
 * develop commercial activities involving the iText software without
 * disclosing the source code of your own applications.
 * These activities include: offering paid services to customers as an ASP,
 * serving PDFs on the fly in a web application, shipping iText with a closed
 * source product.
 *
 * For more information, please contact iText Software Corp. at this
 * address: sales@itextpdf.com
 *
 * This code is base in the libtiff encoder
 */

namespace iTextSharp.text.pdf.codec {
    /**
    * Encodes data in the CCITT G4 FAX format.
    */
    public class CCITTG4Encoder {
        private int rowbytes;
        private int rowpixels;
        private int bit = 8;
        private int data;
        private byte[] refline;
        private ByteBuffer outBuf = new ByteBuffer(1024);
        private byte[] dataBp;
        private int offsetData;
        private int sizeData;
        
        /**
        * Creates a new encoder.
        * @param width the line width
        */    
        public CCITTG4Encoder(int width) {
            rowpixels = width;
            rowbytes = (rowpixels + 7) / 8;
            refline = new byte[rowbytes];
        }
        
        /**
        * Encodes a number of lines.
        * @param data the data to be encoded
        * @param offset the offset into the data
        * @param size the size of the data to be encoded
        */    
        public void Fax4Encode(byte[] data, int offset, int size) {
            dataBp = data;
            offsetData = offset;
            sizeData = size;
            while (sizeData > 0) {
                Fax3Encode2DRow();
                Array.Copy(dataBp, offsetData, refline, 0, rowbytes);
                offsetData += rowbytes;
                sizeData -= rowbytes;
            }
        }
        

        /**
        * Encodes a full image.
        * @param data the data to encode
        * @param width the image width
        * @param height the image height
        * @return the encoded image
        */    
        public static byte[] Compress(byte[] data, int width, int height) {
            CCITTG4Encoder g4 = new CCITTG4Encoder(width);
            g4.Fax4Encode(data, 0, g4.rowbytes * height);
            return g4.Close();
        }
        
        /**
        * Encodes a number of lines.
        * @param data the data to be encoded
        * @param height the number of lines to encode
        */    
        public void Fax4Encode(byte[] data, int height) {
            Fax4Encode(data, 0, rowbytes * height);
        }

        private void Putcode(int[] table) {
            PutBits(table[CODE], table[LENGTH]);
        }
        
        private void Putspan(int span, int[][] tab) {
            int code, length;
            
            while (span >= 2624) {
                int[] te = tab[63 + (2560>>6)];
                code = te[CODE];
                length = te[LENGTH];
                PutBits(code, length);
                span -= te[RUNLEN];
            }
            if (span >= 64) {
                int[] te = tab[63 + (span>>6)];
                code = te[CODE];
                length = te[LENGTH];
                PutBits(code, length);
                span -= te[RUNLEN];
            }
            code = tab[span][CODE];
            length = tab[span][LENGTH];
            PutBits(code, length);
        }
        
        private void PutBits(int bits, int length) {
            while (length > bit) {
                data |= bits >> (length - bit);
                length -= bit;
                outBuf.Append((byte)data);
                data = 0;
                bit = 8;
            }
            data |= (bits & msbmask[length]) << (bit - length);
            bit -= length;
            if (bit == 0) {
                outBuf.Append((byte)data);
                data = 0;
                bit = 8;
            }
        }
        
        private void Fax3Encode2DRow() {
            int a0 = 0;
            int a1 = (Pixel(dataBp, offsetData, 0) != 0 ? 0 : Finddiff(dataBp, offsetData, 0, rowpixels, 0));
            int b1 = (Pixel(refline, 0, 0) != 0 ? 0 : Finddiff(refline, 0, 0, rowpixels, 0));
            int a2, b2;
            
            for (;;) {
                b2 = Finddiff2(refline, 0, b1, rowpixels, Pixel(refline, 0,b1));
                if (b2 >= a1) {
                    int d = b1 - a1;
                    if (!(-3 <= d && d <= 3)) { /* horizontal mode */
                        a2 = Finddiff2(dataBp, offsetData, a1, rowpixels, Pixel(dataBp, offsetData,a1));
                        Putcode(horizcode);
                        if (a0+a1 == 0 || Pixel(dataBp, offsetData, a0) == 0) {
                            Putspan(a1-a0, TIFFFaxWhiteCodes);
                            Putspan(a2-a1, TIFFFaxBlackCodes);
                        } else {
                            Putspan(a1-a0, TIFFFaxBlackCodes);
                            Putspan(a2-a1, TIFFFaxWhiteCodes);
                        }
                        a0 = a2;
                    } else {            /* vertical mode */
                        Putcode(vcodes[d+3]);
                        a0 = a1;
                    }
                } else {                /* pass mode */
                    Putcode(passcode);
                    a0 = b2;
                }
                if (a0 >= rowpixels)
                    break;
                a1 = Finddiff(dataBp, offsetData, a0, rowpixels, Pixel(dataBp, offsetData,a0));
                b1 = Finddiff(refline, 0, a0, rowpixels, Pixel(dataBp, offsetData,a0) ^ 1);
                b1 = Finddiff(refline, 0, b1, rowpixels, Pixel(dataBp, offsetData,a0));
            }
        }
        
        private void Fax4PostEncode() {
            PutBits(EOL, 12);
            PutBits(EOL, 12);
            if (bit != 8) {
                outBuf.Append((byte)data);
                data = 0;
                bit = 8;
            }
        }
        
        /**
        * Closes the encoder and returns the encoded data.
        * @return the encoded data
        */    
        public byte[] Close() {
            Fax4PostEncode();
            return outBuf.ToByteArray();
        }
        
        private int Pixel(byte[] data, int offset, int bit) {
            if (bit >= rowpixels)
                return 0;
            return ((data[offset + (bit >> 3)] & 0xff) >> (7-((bit)&7))) & 1;
        }
        
        private static int Find1span(byte[] bp, int offset, int bs, int be) {
            int bits = be - bs;
            int n, span;
            
            int pos = offset + (bs >> 3);
            /*
            * Check partial byte on lhs.
            */
            if (bits > 0 && (n = (bs & 7)) != 0) {
                span = oneruns[((int)bp[pos] << n) & 0xff];
                if (span > 8-n)     /* table value too generous */
                    span = 8-n;
                if (span > bits)    /* constrain span to bit range */
                    span = bits;
                if (n+span < 8)     /* doesn't extend to edge of byte */
                    return (span);
                bits -= span;
                pos++;
            } else
                span = 0;
            /*
            * Scan full bytes for all 1's.
            */
            while (bits >= 8) {
                if (bp[pos] != 0xff)  /* end of run */
                    return (span + oneruns[bp[pos] & 0xff]);
                span += 8;
                bits -= 8;
                pos++;
            }
            /*
            * Check partial byte on rhs.
            */
            if (bits > 0) {
                n = oneruns[bp[pos] & 0xff];
                span += (n > bits ? bits : n);
            }
            return (span);
        }
        
        private static int Find0span(byte[] bp, int offset, int bs, int be) {
            int bits = be - bs;
            int n, span;
            
            int pos = offset + (bs >> 3);
            /*
            * Check partial byte on lhs.
            */
            if (bits > 0 && (n = (bs & 7)) != 0) {
                span = zeroruns[((int)bp[pos] << n) & 0xff];
                if (span > 8-n)     /* table value too generous */
                    span = 8-n;
                if (span > bits)    /* constrain span to bit range */
                    span = bits;
                if (n+span < 8)     /* doesn't extend to edge of byte */
                    return (span);
                bits -= span;
                pos++;
            } else
                span = 0;
            /*
            * Scan full bytes for all 1's.
            */
            while (bits >= 8) {
                if (bp[pos] != 0)   /* end of run */
                    return (span + zeroruns[bp[pos] & 0xff]);
                span += 8;
                bits -= 8;
                pos++;
            }
            /*
            * Check partial byte on rhs.
            */
            if (bits > 0) {
                n = zeroruns[bp[pos] & 0xff];
                span += (n > bits ? bits : n);
            }
            return (span);
        }
        
        private static int Finddiff(byte[] bp, int offset, int bs, int be, int color) {
            return bs + (color != 0 ? Find1span(bp, offset, bs, be) : Find0span(bp, offset, bs, be));
        }
        
        private static int Finddiff2(byte[] bp, int offset, int bs, int be, int color) {
            return bs < be ? Finddiff(bp, offset, bs, be, color) : be;
        }
        
        private static byte[] zeroruns = {
            8, 7, 6, 6, 5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, /* 0x00 - 0x0f */
            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0x10 - 0x1f */
            2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x20 - 0x2f */
            2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0x30 - 0x3f */
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x40 - 0x4f */
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x50 - 0x5f */
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x60 - 0x6f */
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x70 - 0x7f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x80 - 0x8f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x90 - 0x9f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xa0 - 0xaf */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xb0 - 0xbf */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xc0 - 0xcf */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xd0 - 0xdf */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0xe0 - 0xef */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0  /* 0xf0 - 0xff */
        };
        
        private static byte[] oneruns = {
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00 - 0x0f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10 - 0x1f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x20 - 0x2f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x30 - 0x3f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x40 - 0x4f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x50 - 0x5f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x60 - 0x6f */
            0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x70 - 0x7f */
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x80 - 0x8f */
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x90 - 0x9f */
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xa0 - 0xaf */
            1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0xb0 - 0xbf */
            2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0xc0 - 0xcf */
            2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, /* 0xd0 - 0xdf */
            3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, /* 0xe0 - 0xef */
            4, 4, 4, 4, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6, 7, 8  /* 0xf0 - 0xff */
        };

        private const int LENGTH = 0; /* bit length of g3 code */
        private const int CODE = 1;   /* g3 code */
        private const int RUNLEN = 2; /* run length in bits */

        private const int EOL = 0x001; /* EOL code value - 0000 0000 0000 1 */

        /* status values returned instead of a run length */
        private const int G3CODE_EOL = -1;     /* NB: ACT_EOL - ACT_WRUNT */
        private const int G3CODE_INVALID = -2; /* NB: ACT_INVALID - ACT_WRUNT */
        private const int G3CODE_EOF = -3;     /* end of input data */
        private const int G3CODE_INCOMP = -4;  /* incomplete run code */

        private int[][] TIFFFaxWhiteCodes = {
            new int[]{ 8, 0x35, 0 }, /* 0011 0101 */
            new int[]{ 6, 0x7, 1 },  /* 0001 11 */
            new int[]{ 4, 0x7, 2 },  /* 0111 */
            new int[]{ 4, 0x8, 3 },  /* 1000 */
            new int[]{ 4, 0xB, 4 },  /* 1011 */
            new int[]{ 4, 0xC, 5 },  /* 1100 */
            new int[]{ 4, 0xE, 6 },  /* 1110 */
            new int[]{ 4, 0xF, 7 },  /* 1111 */
            new int[]{ 5, 0x13, 8 }, /* 1001 1 */
            new int[]{ 5, 0x14, 9 }, /* 1010 0 */
            new int[]{ 5, 0x7, 10 }, /* 0011 1 */
            new int[]{ 5, 0x8, 11 }, /* 0100 0 */
            new int[]{ 6, 0x8, 12 }, /* 0010 00 */
            new int[]{ 6, 0x3, 13 }, /* 0000 11 */
            new int[]{ 6, 0x34, 14 },    /* 1101 00 */
            new int[]{ 6, 0x35, 15 },    /* 1101 01 */
            new int[]{ 6, 0x2A, 16 },    /* 1010 10 */
            new int[]{ 6, 0x2B, 17 },    /* 1010 11 */
            new int[]{ 7, 0x27, 18 },    /* 0100 111 */
            new int[]{ 7, 0xC, 19 }, /* 0001 100 */
            new int[]{ 7, 0x8, 20 }, /* 0001 000 */
            new int[]{ 7, 0x17, 21 },    /* 0010 111 */
            new int[]{ 7, 0x3, 22 }, /* 0000 011 */
            new int[]{ 7, 0x4, 23 }, /* 0000 100 */
            new int[]{ 7, 0x28, 24 },    /* 0101 000 */
            new int[]{ 7, 0x2B, 25 },    /* 0101 011 */
            new int[]{ 7, 0x13, 26 },    /* 0010 011 */
            new int[]{ 7, 0x24, 27 },    /* 0100 100 */
            new int[]{ 7, 0x18, 28 },    /* 0011 000 */
            new int[]{ 8, 0x2, 29 }, /* 0000 0010 */
            new int[]{ 8, 0x3, 30 }, /* 0000 0011 */
            new int[]{ 8, 0x1A, 31 },    /* 0001 1010 */
            new int[]{ 8, 0x1B, 32 },    /* 0001 1011 */
            new int[]{ 8, 0x12, 33 },    /* 0001 0010 */
            new int[]{ 8, 0x13, 34 },    /* 0001 0011 */
            new int[]{ 8, 0x14, 35 },    /* 0001 0100 */
            new int[]{ 8, 0x15, 36 },    /* 0001 0101 */
            new int[]{ 8, 0x16, 37 },    /* 0001 0110 */
            new int[]{ 8, 0x17, 38 },    /* 0001 0111 */
            new int[]{ 8, 0x28, 39 },    /* 0010 1000 */
            new int[]{ 8, 0x29, 40 },    /* 0010 1001 */
            new int[]{ 8, 0x2A, 41 },    /* 0010 1010 */
            new int[]{ 8, 0x2B, 42 },    /* 0010 1011 */
            new int[]{ 8, 0x2C, 43 },    /* 0010 1100 */
            new int[]{ 8, 0x2D, 44 },    /* 0010 1101 */
            new int[]{ 8, 0x4, 45 }, /* 0000 0100 */
            new int[]{ 8, 0x5, 46 }, /* 0000 0101 */
            new int[]{ 8, 0xA, 47 }, /* 0000 1010 */
            new int[]{ 8, 0xB, 48 }, /* 0000 1011 */
            new int[]{ 8, 0x52, 49 },    /* 0101 0010 */
            new int[]{ 8, 0x53, 50 },    /* 0101 0011 */
            new int[]{ 8, 0x54, 51 },    /* 0101 0100 */
            new int[]{ 8, 0x55, 52 },    /* 0101 0101 */
            new int[]{ 8, 0x24, 53 },    /* 0010 0100 */
            new int[]{ 8, 0x25, 54 },    /* 0010 0101 */
            new int[]{ 8, 0x58, 55 },    /* 0101 1000 */
            new int[]{ 8, 0x59, 56 },    /* 0101 1001 */
            new int[]{ 8, 0x5A, 57 },    /* 0101 1010 */
            new int[]{ 8, 0x5B, 58 },    /* 0101 1011 */
            new int[]{ 8, 0x4A, 59 },    /* 0100 1010 */
            new int[]{ 8, 0x4B, 60 },    /* 0100 1011 */
            new int[]{ 8, 0x32, 61 },    /* 0011 0010 */
            new int[]{ 8, 0x33, 62 },    /* 0011 0011 */
            new int[]{ 8, 0x34, 63 },    /* 0011 0100 */
            new int[]{ 5, 0x1B, 64 },    /* 1101 1 */
            new int[]{ 5, 0x12, 128 },   /* 1001 0 */
            new int[]{ 6, 0x17, 192 },   /* 0101 11 */
            new int[]{ 7, 0x37, 256 },   /* 0110 111 */
            new int[]{ 8, 0x36, 320 },   /* 0011 0110 */
            new int[]{ 8, 0x37, 384 },   /* 0011 0111 */
            new int[]{ 8, 0x64, 448 },   /* 0110 0100 */
            new int[]{ 8, 0x65, 512 },   /* 0110 0101 */
            new int[]{ 8, 0x68, 576 },   /* 0110 1000 */
            new int[]{ 8, 0x67, 640 },   /* 0110 0111 */
            new int[]{ 9, 0xCC, 704 },   /* 0110 0110 0 */
            new int[]{ 9, 0xCD, 768 },   /* 0110 0110 1 */
            new int[]{ 9, 0xD2, 832 },   /* 0110 1001 0 */
            new int[]{ 9, 0xD3, 896 },   /* 0110 1001 1 */
            new int[]{ 9, 0xD4, 960 },   /* 0110 1010 0 */
            new int[]{ 9, 0xD5, 1024 },  /* 0110 1010 1 */
            new int[]{ 9, 0xD6, 1088 },  /* 0110 1011 0 */
            new int[]{ 9, 0xD7, 1152 },  /* 0110 1011 1 */
            new int[]{ 9, 0xD8, 1216 },  /* 0110 1100 0 */
            new int[]{ 9, 0xD9, 1280 },  /* 0110 1100 1 */
            new int[]{ 9, 0xDA, 1344 },  /* 0110 1101 0 */
            new int[]{ 9, 0xDB, 1408 },  /* 0110 1101 1 */
            new int[]{ 9, 0x98, 1472 },  /* 0100 1100 0 */
            new int[]{ 9, 0x99, 1536 },  /* 0100 1100 1 */
            new int[]{ 9, 0x9A, 1600 },  /* 0100 1101 0 */
            new int[]{ 6, 0x18, 1664 },  /* 0110 00 */
            new int[]{ 9, 0x9B, 1728 },  /* 0100 1101 1 */
            new int[]{ 11, 0x8, 1792 },  /* 0000 0001 000 */
            new int[]{ 11, 0xC, 1856 },  /* 0000 0001 100 */
            new int[]{ 11, 0xD, 1920 },  /* 0000 0001 101 */
            new int[]{ 12, 0x12, 1984 }, /* 0000 0001 0010 */
            new int[]{ 12, 0x13, 2048 }, /* 0000 0001 0011 */
            new int[]{ 12, 0x14, 2112 }, /* 0000 0001 0100 */
            new int[]{ 12, 0x15, 2176 }, /* 0000 0001 0101 */
            new int[]{ 12, 0x16, 2240 }, /* 0000 0001 0110 */
            new int[]{ 12, 0x17, 2304 }, /* 0000 0001 0111 */
            new int[]{ 12, 0x1C, 2368 }, /* 0000 0001 1100 */
            new int[]{ 12, 0x1D, 2432 }, /* 0000 0001 1101 */
            new int[]{ 12, 0x1E, 2496 }, /* 0000 0001 1110 */
            new int[]{ 12, 0x1F, 2560 }, /* 0000 0001 1111 */
            new int[]{ 12, 0x1, G3CODE_EOL },    /* 0000 0000 0001 */
            new int[]{ 9, 0x1, G3CODE_INVALID }, /* 0000 0000 1 */
            new int[]{ 10, 0x1, G3CODE_INVALID },    /* 0000 0000 01 */
            new int[]{ 11, 0x1, G3CODE_INVALID },    /* 0000 0000 001 */
            new int[]{ 12, 0x0, G3CODE_INVALID } /* 0000 0000 0000 */
        };

        private int[][] TIFFFaxBlackCodes = {
            new int[]{ 10, 0x37, 0 },    /* 0000 1101 11 */
            new int[]{ 3, 0x2, 1 },  /* 010 */
            new int[]{ 2, 0x3, 2 },  /* 11 */
            new int[]{ 2, 0x2, 3 },  /* 10 */
            new int[]{ 3, 0x3, 4 },  /* 011 */
            new int[]{ 4, 0x3, 5 },  /* 0011 */
            new int[]{ 4, 0x2, 6 },  /* 0010 */
            new int[]{ 5, 0x3, 7 },  /* 0001 1 */
            new int[]{ 6, 0x5, 8 },  /* 0001 01 */
            new int[]{ 6, 0x4, 9 },  /* 0001 00 */
            new int[]{ 7, 0x4, 10 }, /* 0000 100 */
            new int[]{ 7, 0x5, 11 }, /* 0000 101 */
            new int[]{ 7, 0x7, 12 }, /* 0000 111 */
            new int[]{ 8, 0x4, 13 }, /* 0000 0100 */
            new int[]{ 8, 0x7, 14 }, /* 0000 0111 */
            new int[]{ 9, 0x18, 15 },    /* 0000 1100 0 */
            new int[]{ 10, 0x17, 16 },   /* 0000 0101 11 */
            new int[]{ 10, 0x18, 17 },   /* 0000 0110 00 */
            new int[]{ 10, 0x8, 18 },    /* 0000 0010 00 */
            new int[]{ 11, 0x67, 19 },   /* 0000 1100 111 */
            new int[]{ 11, 0x68, 20 },   /* 0000 1101 000 */
            new int[]{ 11, 0x6C, 21 },   /* 0000 1101 100 */
            new int[]{ 11, 0x37, 22 },   /* 0000 0110 111 */
            new int[]{ 11, 0x28, 23 },   /* 0000 0101 000 */
            new int[]{ 11, 0x17, 24 },   /* 0000 0010 111 */
            new int[]{ 11, 0x18, 25 },   /* 0000 0011 000 */
            new int[]{ 12, 0xCA, 26 },   /* 0000 1100 1010 */
            new int[]{ 12, 0xCB, 27 },   /* 0000 1100 1011 */
            new int[]{ 12, 0xCC, 28 },   /* 0000 1100 1100 */
            new int[]{ 12, 0xCD, 29 },   /* 0000 1100 1101 */
            new int[]{ 12, 0x68, 30 },   /* 0000 0110 1000 */
            new int[]{ 12, 0x69, 31 },   /* 0000 0110 1001 */
            new int[]{ 12, 0x6A, 32 },   /* 0000 0110 1010 */
            new int[]{ 12, 0x6B, 33 },   /* 0000 0110 1011 */
            new int[]{ 12, 0xD2, 34 },   /* 0000 1101 0010 */
            new int[]{ 12, 0xD3, 35 },   /* 0000 1101 0011 */
            new int[]{ 12, 0xD4, 36 },   /* 0000 1101 0100 */
            new int[]{ 12, 0xD5, 37 },   /* 0000 1101 0101 */
            new int[]{ 12, 0xD6, 38 },   /* 0000 1101 0110 */
            new int[]{ 12, 0xD7, 39 },   /* 0000 1101 0111 */
            new int[]{ 12, 0x6C, 40 },   /* 0000 0110 1100 */
            new int[]{ 12, 0x6D, 41 },   /* 0000 0110 1101 */
            new int[]{ 12, 0xDA, 42 },   /* 0000 1101 1010 */
            new int[]{ 12, 0xDB, 43 },   /* 0000 1101 1011 */
            new int[]{ 12, 0x54, 44 },   /* 0000 0101 0100 */
            new int[]{ 12, 0x55, 45 },   /* 0000 0101 0101 */
            new int[]{ 12, 0x56, 46 },   /* 0000 0101 0110 */
            new int[]{ 12, 0x57, 47 },   /* 0000 0101 0111 */
            new int[]{ 12, 0x64, 48 },   /* 0000 0110 0100 */
            new int[]{ 12, 0x65, 49 },   /* 0000 0110 0101 */
            new int[]{ 12, 0x52, 50 },   /* 0000 0101 0010 */
            new int[]{ 12, 0x53, 51 },   /* 0000 0101 0011 */
            new int[]{ 12, 0x24, 52 },   /* 0000 0010 0100 */
            new int[]{ 12, 0x37, 53 },   /* 0000 0011 0111 */
            new int[]{ 12, 0x38, 54 },   /* 0000 0011 1000 */
            new int[]{ 12, 0x27, 55 },   /* 0000 0010 0111 */
            new int[]{ 12, 0x28, 56 },   /* 0000 0010 1000 */
            new int[]{ 12, 0x58, 57 },   /* 0000 0101 1000 */
            new int[]{ 12, 0x59, 58 },   /* 0000 0101 1001 */
            new int[]{ 12, 0x2B, 59 },   /* 0000 0010 1011 */
            new int[]{ 12, 0x2C, 60 },   /* 0000 0010 1100 */
            new int[]{ 12, 0x5A, 61 },   /* 0000 0101 1010 */
            new int[]{ 12, 0x66, 62 },   /* 0000 0110 0110 */
            new int[]{ 12, 0x67, 63 },   /* 0000 0110 0111 */
            new int[]{ 10, 0xF, 64 },    /* 0000 0011 11 */
            new int[]{ 12, 0xC8, 128 },  /* 0000 1100 1000 */
            new int[]{ 12, 0xC9, 192 },  /* 0000 1100 1001 */
            new int[]{ 12, 0x5B, 256 },  /* 0000 0101 1011 */
            new int[]{ 12, 0x33, 320 },  /* 0000 0011 0011 */
            new int[]{ 12, 0x34, 384 },  /* 0000 0011 0100 */
            new int[]{ 12, 0x35, 448 },  /* 0000 0011 0101 */
            new int[]{ 13, 0x6C, 512 },  /* 0000 0011 0110 0 */
            new int[]{ 13, 0x6D, 576 },  /* 0000 0011 0110 1 */
            new int[]{ 13, 0x4A, 640 },  /* 0000 0010 0101 0 */
            new int[]{ 13, 0x4B, 704 },  /* 0000 0010 0101 1 */
            new int[]{ 13, 0x4C, 768 },  /* 0000 0010 0110 0 */
            new int[]{ 13, 0x4D, 832 },  /* 0000 0010 0110 1 */
            new int[]{ 13, 0x72, 896 },  /* 0000 0011 1001 0 */
            new int[]{ 13, 0x73, 960 },  /* 0000 0011 1001 1 */
            new int[]{ 13, 0x74, 1024 }, /* 0000 0011 1010 0 */
            new int[]{ 13, 0x75, 1088 }, /* 0000 0011 1010 1 */
            new int[]{ 13, 0x76, 1152 }, /* 0000 0011 1011 0 */
            new int[]{ 13, 0x77, 1216 }, /* 0000 0011 1011 1 */
            new int[]{ 13, 0x52, 1280 }, /* 0000 0010 1001 0 */
            new int[]{ 13, 0x53, 1344 }, /* 0000 0010 1001 1 */
            new int[]{ 13, 0x54, 1408 }, /* 0000 0010 1010 0 */
            new int[]{ 13, 0x55, 1472 }, /* 0000 0010 1010 1 */
            new int[]{ 13, 0x5A, 1536 }, /* 0000 0010 1101 0 */
            new int[]{ 13, 0x5B, 1600 }, /* 0000 0010 1101 1 */
            new int[]{ 13, 0x64, 1664 }, /* 0000 0011 0010 0 */
            new int[]{ 13, 0x65, 1728 }, /* 0000 0011 0010 1 */
            new int[]{ 11, 0x8, 1792 },  /* 0000 0001 000 */
            new int[]{ 11, 0xC, 1856 },  /* 0000 0001 100 */
            new int[]{ 11, 0xD, 1920 },  /* 0000 0001 101 */
            new int[]{ 12, 0x12, 1984 }, /* 0000 0001 0010 */
            new int[]{ 12, 0x13, 2048 }, /* 0000 0001 0011 */
            new int[]{ 12, 0x14, 2112 }, /* 0000 0001 0100 */
            new int[]{ 12, 0x15, 2176 }, /* 0000 0001 0101 */
            new int[]{ 12, 0x16, 2240 }, /* 0000 0001 0110 */
            new int[]{ 12, 0x17, 2304 }, /* 0000 0001 0111 */
            new int[]{ 12, 0x1C, 2368 }, /* 0000 0001 1100 */
            new int[]{ 12, 0x1D, 2432 }, /* 0000 0001 1101 */
            new int[]{ 12, 0x1E, 2496 }, /* 0000 0001 1110 */
            new int[]{ 12, 0x1F, 2560 }, /* 0000 0001 1111 */
            new int[]{ 12, 0x1, G3CODE_EOL },    /* 0000 0000 0001 */
            new int[]{ 9, 0x1, G3CODE_INVALID }, /* 0000 0000 1 */
            new int[]{ 10, 0x1, G3CODE_INVALID },    /* 0000 0000 01 */
            new int[]{ 11, 0x1, G3CODE_INVALID },    /* 0000 0000 001 */
            new int[]{ 12, 0x0, G3CODE_INVALID } /* 0000 0000 0000 */
        };
        
        private int[] horizcode =
            { 3, 0x1, 0 };      /* 001 */
        private int[] passcode =
            { 4, 0x1, 0 };      /* 0001 */
        private int[][] vcodes = {
            new int[]{ 7, 0x03, 0 }, /* 0000 011 */
            new int[]{ 6, 0x03, 0 }, /* 0000 11 */
            new int[]{ 3, 0x03, 0 }, /* 011 */
            new int[]{ 1, 0x1, 0 },      /* 1 */
            new int[]{ 3, 0x2, 0 },      /* 010 */
            new int[]{ 6, 0x02, 0 }, /* 0000 10 */
            new int[]{ 7, 0x02, 0 }      /* 0000 010 */
        };
        private int[] msbmask =
        { 0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff };
    }
}
